This episode has a whole bunch of complicated-sounding terms that you may have never heard before. 

One of them is sinus tarsi syndrome, and the other one is FHL tenosynovitis or flexor hallucis longus tenosynovitis. 

Sinus tarsi syndrome is often confused with ankle pain. 

FHL tenosynovitis is often confused with plantar fasciitis. 

These conditions affect opposite sides of the same foot. Yet, one can lead to the other. 

Today on the Doc on the Run podcast, we're talking about how sinus tarsi syndrome can cause flexor hallucis longus tenosynovitis.